Wrench



APPLICA MAR. H| 1920- 1,361,518.

Patented Dec. 7, 1920.

\ IN VEN TOR.

' Mrs/vi] 60076 A TTOR NE Y;

UNITED STATES PATENT OFFICE.

MARSHALL COOK, OF'GHICAGO, ILLINOIS, ASS-IGNOR.OF ONE-HALF TO GARRETT J.

REIDY, OF CHICAGO, ILLINOIS.

WRENCH.

Patented Dec. '7, 1920.

Application filed March 11, 1920. Serial No. 364,959.

To all whom it may concern Be it known that I, MARsHALL Coon, a citizenof the United States, residing at Chicago, in the county of Cook andState of Illinois, have invented new and useful Im provements inWrenches, of which the following is a specification.

This invention relates to wrenches having a shank carrying a sliding jawwhich is locked on the shank by a transversely slidable pawl engaging arack thereon.

The invention relates more particularly to the locking means of theslidable jaw, and its object is to provide a simple and efiicient pawland rack catch which will securely hold the jaw in adjusted position,and which can be easily controlled.

The object stated is attained by means of a combination and arrangementof parts to be hereinafter described and claimed, and in order that thesame may be better understood. reference is had to the accompanyingdrawing forming a part of this specification.

In the drawing, Figure 1 is an elevation of the wrench; Fig. 2 is across section showing the jaw adjusting means, and Fig. 3 is a detail inperspective.

Referring speclfically to the drawing, 5 denotes the shank of thewrench, provided at its outer end with a fixed jaw 6, and carrying aslidable jaw 7 to cooperate with the latter in the usual manner.

The front edge of the shank 5 has a rack 8 engageable by a pawl 9carried by the aw 7, for locking the latter in adjusted position on theshank. That portion of the jaw 7 which is opposite the rack edge of theshank has a recess 10 opening to said edge, and seating the pawl 9, thelatter being positioned transversely with respect to the shank, andslidable in the recess to engage the rack. The rack engaging end of thepawl is beveled so that the pawl automatically slips back when the jaw 7is slid along the shank in the direction of the fixed jaw 6. Between therear end of the pawl and the opposite wall of the recess in which it ismounted, is located a spring 11 for advancing the pawl to holdingposition.

The recess 10 housing the pawl 9 is continued throi'lgh the rear face ofthe jaw 7 in the shape of a slot 12 to seat a web 13 extending from thepawl and terminating in a fiat plate-like enlargement 14 seating againstsaid rear face of the jaw, said part 14 having an aperture 15 throughwhich shank 5 passes. Opposite the rear edge of the shank, the part 14is formed into a finger piece 16, which latter, whenit is pressedinwardly, or in the direction of the shank, slides the part 14transversely of the shank, and as the pawl 9 is joined to said part 14by the web 18, the pawl is hacked to clear the rack 8. The jaw 7 is nowfree to be backed from the jaw 6, and upon releasing the finger piece16, the spring 11 advances the pawl into locking engagement with therack, to lock the jaw 7 to the shank 5. It will be understood that theaperture 15 is longer than the width of the shank 5, in order to permitthe part 14 to be operated as described. The pawl 9 is wider than theslot 12 and the web 13, so that the pawl is The wrench is strong anddurable, and the jaw 7 will be securely held in adjusted position by thepawl 9. If the rack 8 should become worn out from long continued use ofthe wrench, or if some of the rack teeth should break, the shank 5 canbe removed and replaced by a new one.

I claim:

A wrench having a shank provided with a rack, a jaw slidable on theshank, and having arecess opening to the rack, and a slot leading fromsaid recess and opening through the rear face of the jaw, a pawlslidably seating in the recess to engage the rack, and having a webseating in the slot, the width of the slotbeing less than that of thepawl to prevent the passage ofthe latter therethrough, and a platecarried by the web, said plate seating against the rear face of the jawand having a slot through which the shank passes, said plate beingslidable on the shank transversely thereof to disengage the pawl.

MARSHALL COOK.

